I enjoy Chik-Fil-A occasionally. I've never had less than fantastic service (overtly fantastic, at that), the food quality is always good (I've NEVER experienced undercooked food at any of their locations, and I travel a lot). Perhaps by undercooked you mean juicy? I'm not trying to be a dick, but their chicken is brined so it will retain moisture during cooking. That's the only thing I an think of why you might have thought it was raw. Undercooked chicken would get that location shut down in a hot minute, especially if it was repeated on more than one occasion. To answer the question about why they put pickles on chicken sandwiches, it's because a lot of taste-demographics in the US like the flavor. The acidity in the sandwich breaks up the richness of a breaded, deep fried patty on bread. Culinarily, it's simple and it balances really well. Their breakfast burritos are also very good. They have Diet Dr. Pepper, so there's that draw too.
For my money: Long John Silvers has to be the worst. Unless you come to Dallas and try Taco Bueno. It's like Taco Bell, but not as classy or of such high quality. We just call it Diarrhea Bueno every time we drive by.
